Psychiatric Disorders in Adolescents Attending Psychiatry Outpatient Department in a Tertiary Care Hospital: A Descriptive Cross-sectional Study

ABSTRACT Introduction: Adolescence is the time when most mental illness begins most of the time these problems are overlooked leading to increased morbidity and mortality. The study is undertaken to find out the prevalence of psychiatric disorders in adolescents attending psychiatry outpatient department in a tertiary hospital. Methods: A descriptive cross-sectional study was done from 1st December 2019 to 29th November 2020 at a tertiary care centre of Kathmandu. Ethical approval (Ref No.: 012-076/077) was taken from the Institution Review Committee. A semi-structured proforma was used for the socio-demographic profile of patients and International Classification of Diseases-10 was used to make the diagnosis. Data were analyzed using Statistical Package for the Social Sciences version 16. Results: A total of 174 adolescents were included in the study. Out of the total cases 141 (81.03%) (75.1-86.8 at 95% Confidence Interval) were diagnosed with psychiatric disorders, among them 73 (51.77%) were males and 68 (48.23%) were females. The common diagnoses were anxiety disorders 63 (36.20%), mood disorders 34 (19.54%), psychotic disorders 26 (14.94%), substance use disorders 8 (4.59%), non-organic sleep disorders 5 (2.87%), behavioral and emotional disorders 3 (1.72%) and mental retardation 2 (1.149%). Conclusions: Prevalence of psychiatric illnesses is high in the adolescent population compared to the similar studies.


INTRODUCTION
Adolescence is the transitional period marked by physiological signs and surging hormones. 1 World Health Organization (WHO) defines adolescence as the age between 10-19 years. 2 One in six people in the world is adoleascents. 3 16% of the global burden of disease in adolescents is due to mental problems as adolescence is marked immense turmoil. 2,3 One in five adolescents experiences a mental health disorder each year. 4 Half of all the mental health conditions start by the age of 14 years but most are undetected. 3 24.19% of the total population in Nepal constitute 10-19 years age group. 5 Physical, emotional and social changes predispose adolescents to mental health problems. 6 Global burden of disease study in 10-24 years old, revealed the leading cause of the years of life lost due to disability is neuropsychiatric disorders (45%). 7 Hence, adolescence is the time of increased risk of psychiatric illness. 8 The aim of the study is to find out the prevalence of psychiatric disorders in adolescents attending psychiatry outpatient department in a tertiary care hospital.

METHODS
This is a descriptive cross-sectional study carried out in Nepal Medical College and Teaching Hospital, Jorpati, Kathmandu for a duration of one year from December 1 st , 2019 to November 29 th , 2020. Ethical clearance was obtained from Institution Review Committee (IRC-NMCTH) before starting the study with an archived approval number 012-076/077. After explaining the objective and plan of study and fulfilling inclusion and exclusion criteria, informed written consent was taken from the patient and/or the guardian. Patients in the age group of 10-19 years were included and patients with serious medical illness were excluded from the study. The cases either presented to the Psychiatric OPD or were referred from other OPDs for consultation.
A self-designed proforma containing questions on socio-demographic data of adolescents was prepared separately and pretested in 17 cases before final administration to enrolled cases. Following this, a detailed clinical interview, mental status examination of the adolescents was done. The diagnosis of psychiatric disorders was made as per the ICD 10 criteria.
Convenience sampling was done and the minimum sample size required for the study was calculated as follow: n = Z 2 x (p x q)/e 2 = (1.96) 2 x 0.33 x 0.67 / (0.05) 2
Selection bias has been minimized as possible and the collected data was analyzed using SPSS 16 and descriptive analysis was done. Point estimate at 95% Confidence Interval was done for binary data along with analysis for frequency and proportion.
The commonest psychiatric diagnosis was anxiety disorders 63 (36.20%), followed by mood disorders 34 (19.54%), psychotic disorders 26 (14.94%), substance abuse disorders were found in 8 (4.59%) adolescents, non-organic sleep disorders in 5 (2.87%), behavioral and emotional disorders in 3 (1.72%) and mental retardation in 2 (1.149%) ( Table 1). The overall distribution from our study showed that the commonest psychiatric disorder was neurotic, stress related and somatoform disorders followed by mood disorders and Schizophrenia, schizotypal and delusional disorders respectively. Other disorders such as mental and behavioral disorders due to psychoactive use and mental retardation were found to be comparatively less common (Figure 1).

DISCUSSION
In our study, the mean age of the patients under study was 16.77±1.99 years. Eighty-one cases were male and 93 cases female patients. Here females seem to attend OPD more since adolescent females experience more mental issues than males which is also supported by other studies. 8 In our study, 81.03% of the adolescents attending the Psychiatric department were diagnosed with a psychiatric disorder. The result was significantly higher than other studies. It could be because the adolescents visiting the OPD were already experiencing some problems. It could also be pointing towards the growing trend of mental problems in this age group. However, this is not representative of the community.
Worldwide, many studies have been conducted on the prevalence of psychiatric comorbidities among adolescents which is found to be variable. A review of studies done in 20 countries, conducted over 40 years, reported a very wide range in prevalence of mental disorders in adolescents. [10][11][12][13][14] Similarly, studies conducted on the adolescents in various parts of India reported a prevalence ranging from 1.81% to 22.17%. 10,[15][16][17] As per a report on a pilot study of the National Mental Health Survey in Nepal, the current prevalence of any form of mental disorders among adolescents is 12.9% with 11.2% in the age group of 13-17years. 18 Other studies in Nepal state that 12.9-30% of adolescents had psychosocial problems. 5,19,20 In our findings anxiety disorders were found to be the commonest, this is similar to the meta-analysis done by Polanczyk,et al. 6.5%, 21 on the worldwide prevalence of mental disorders in children and adolescents, similar findings were recorded by Pillai, et al. 1%, 10 Roberts 6.9%, 22 Mishra 15%, 23 Kessler, et al. 24 In a study done in Dang district, (46.5%) of the secondary school adolescents had anxiety. 25 Our study showed mood disorder to be the second most common disorder. Balgir, et al. 17 reported mood disorders to be the most common and Lynch,et al. 4.5%, 13 reported affective disorders to be the most prevalent in their studies. Kessler, et al. 24 and Merikangas,et al. 14.3%,12 reported mood disorder to be the third most common. Variability in the results may be due to differences in sample size, different study methods used.
There have been various studies demonstrating the increasing trend of suicidal tendencies among adolescents. Lynch, et al. 13 reported 1.9% of adolescents with suicidal ideations, McMahon E, et al. 26 from a study in Ireland reported 7% suicidal ideation and 3.6% of attempted suicide. In Nepal, the National Mental Health survey reported suicidality in 8.7% of adolescents. 18 In our study, suicidal ideations were seen in 12.77% of adolescents while the suicidal attempt was seen in 7.09%.
Our study found Substance abuse disorders (SUD) to be 4.59% which is similar to Roberts, et al. 22 5.3%, other studies reported SUD as Merikangas, et al. 12 11.4%, Kessler, et al. 22 as the fourth common disorders among adolescents. Reinherz, et al. 29 reported drug abuse in 9.8% while a pilot study in Nepal, 18 substance use, in adolescents, was found in 0.7%. Studies have reported variable results, which could be due to the different geographical populations under study and differences in the nature of the study.
The prevalence of sleep disorders was reported to be 1-43% in international studies. 30 Ipsiroglu, et al. 30 reported 12% school children (11)(12)(13)(14)(15) years with sleep problems while 13.1% of adolescents were diagnosed with non-organic sleep disorders by Kaur, et al. 31 In our study, non-organic sleep disorder was found in 2.87% of adolescents, which is within the range mentioned in international studies.
Kessler, et al. 24 reported behavior disorder as the second most common in their study. Merikangas, et al. 12  Wagner, et al. 14 showed 9.3% of adolescents diagnosed with neurodevelopment disorders. 6.8 % of adolescents were diagnosed with neurodevelopment disorders in a study by Ogbonna,et al. 32 In our study, 1.149% of adolescents were diagnosed with Intellectual disability. This low percentage could be because most neurodevelopment disorders are diagnosed in childhood itself, hence fewer remain to be diagnosed up until adolescence.
The limitation of this study is its small number of cases, convenience sampling, and study done at a single center. We need larger studies with larger sample size, scientific sampling, and multicentered studies to understand the magnitude of the problem in the population in the future.

CONCLUSIONS
Worldwide, a large number of studies have been reported in the medical literature pointing towards the increased prevalence of psychiatric disorders in adolescent patients. However, in Nepal, there is a scarcity of studies that explore the arena of adolescent mental health. Our study concluded that the burden of psychiatric disorders is increasing in the adolescent population and hence needs to be addressed. The findings of our study intend to suggest that the prevalence of psychiatric illnesses is high in the adolescent population compared to similar studies. This emphasizes the need for screening all adolescents and to educate the family and guardians regarding the mental illnesses and warning signs, for early detection and treatment.